/*--------------------------头部--------------------------------------*/
.logo{
    width: 108px;
    height: 60px;
    background: url(../img/logo.png) no-repeat center;
    background-size: 100%;
    text-indent: -9999px;
    float: left;
    margin-right: 52px;
}
.header_nav{
    float: left;
    font-size: 20px;
    line-height: 60px;
}
.header_nav a{
    padding: 0 13px;
    float: left;
    height: 100%;
    position: relative;
    margin: 0 5px;
}
.header_nav a:hover{
    color: #ff6767;
}
.header_nav a::after{
    content: '';
    position: absolute;
    left: 0;
    bottom: 0;
    width: 100%;
    height: 2px;
    background: #ff6767;
    transition: .2s;
    transform: scale(0);
}
.header_nav a:hover::after{
    transform: scale(1);
}